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Interest Paid in Cash Including Payments Related to Derivative Contracts (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] |  |  |  |
Interest paid in cash including payments related to derivative contracts | $ 22.9 | $ 21.3 | $ 44.9 | $ 42.5

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- Definition The amount of cash paid for interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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